C45.9Billable

Mesothelioma, unspecified

Chapter
2. Neoplasms
Category
C45
Effective date
October 1, 2026

Related codes in category C45

C45MesotheliomaC45.0Mesothelioma of pleuraYesC45.1Mesothelioma of peritoneumYesC45.2Mesothelioma of pericardiumYesC45.7Mesothelioma of other sitesYes

Frequently asked questions

What is ICD-10 code C45.9?

C45.9 is an ICD-10-CM diagnosis code for Mesothelioma, unspecified.

Is C45.9 a billable code?

Yes. C45.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is C45.9 in?

C45.9 falls under Chapter 2: Neoplasms.

When did C45.9 become effective?

C45.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C45.9?

C45.9 belongs to category C45, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.